Reference Clock Receiver Interface With Dynamic Multi-Termination

The patent implements dynamic termination configuration by using control signals to dynamically switch between different termination schemes (LVPECL and HCSL) and termination locations (on-chip and external). The termination resistance and common mode voltage are dynamically adjusted based on the selected logic standard, allowing the receiver to adapt to different requirements without manual reconfiguration or multiple fixed circuits.

The reference clock receiver is designed with universal functionality to support multiple logic standards (LVPECL and HCSL) through a single unified circuit architecture. The same receiver circuit can be configured for different termination schemes by controlling the activation of specific transistors and resistors, eliminating the need for separate dedicated circuits for each standard and reducing overall device complexity.

The on-chip termination components (resistors and transistors) are dynamically controlled to provide termination only when needed. The control logic selectively activates the on-chip termination path based on the selected logic standard and termination mode, allowing the circuit to switch between on-chip and external termination configurations without permanently adding complex infrastructure for both modes simultaneously.

The patent uses control signals as intermediaries to manage the activation and deactivation of on-chip termination components. These control signals coordinate the switching between different termination configurations, ensuring that the appropriate components are activated only when required, thereby minimizing the effective component count and complexity while maintaining signal quality when on-chip termination is needed.